A four-wheel drive transfer case for an electronically controlled mechanical tractor

Abstract

The present invention discloses a four-wheel drive transfer case for an electronically controlled mechanical tractor, comprising a housing and a fork side cover, wherein an output shaft extending to the outside of the housing is rotatably connected to the middle position inside the housing, and a transmission shaft bushing is installed on one side of the output shaft surface, a driven gear is arranged on the output shaft surface on one side of the transmission shaft bushing, and a driving link wheel is arranged on the output shaft surface on one side of the driven gear, a front bearing cap is installed on one side of the housing on the output shaft surface, and a rear bearing cap is installed on the other side of the housing on the output shaft surface, an intermediate shaft is rotatably connected to one side of the top end inside the housing, and an intermediate gear meshing with the driven gear is installed on the surface of the intermediate shaft. The present invention arranges a cylinder, utilizes the cylinder to drive the movement of the driven gear, and then realizes the transmission of power, avoids the cumbersomeness of the traditional manual operation of the driving rod, and makes the whole process simpler and lighter.

Description

Technical Field

[0001] The invention relates to the technical field of tractors, in particular to a four-wheel drive transfer case for an electronically controlled mechanical tractor. Background Art

[0002] With the development of society and the continuous progress of my country's industry, agricultural machinery has become more and more numerous. Among them, four-wheel drive tractors have excellent grip performance and traction, so they are widely used. The four-wheel drive transfer case is a very important component inside it. However, the existing four-wheel drive transfer cases for electronically controlled mechanical tractors still have many problems or defects:

[0003] First, the traditional electronically controlled mechanical tractor uses a four-wheel drive transfer case, which requires manual operation of the four-wheel drive pull rod, which is cumbersome to use.

[0004] Second, the traditional electronically controlled mechanical tractor four-wheel drive transfer case has no filtering structure when in use. When transporting gas, impurities may enter and affect its normal use.

[0005] Third, the traditional electronically controlled mechanical tractor four-wheel drive transfer case has no lubrication structure during use, which will cause greater friction during long-term use, thus affecting its service life. Summary of the invention

[0006] The object of the present invention is to provide an electronically controlled mechanical four-wheel drive transfer case for a tractor, so as to solve the problems of complicated operation, inconvenient filtering and inconvenient lubrication proposed in the above-mentioned background technology.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: an electrically controlled mechanical tractor four-wheel drive transfer case, comprising a housing and a fork side cover, and also comprising a lubrication structure to avoid excessive friction, a filtering structure to increase the service life of the equipment, and a pneumatic mechanism to avoid cumbersome operation;

[0008] An output shaft extending to the outside of the housing is rotatably connected to the middle position of the housing, and a transmission shaft bushing is installed on one side of the output shaft surface, a driven gear is arranged on the output shaft surface on one side of the transmission shaft bushing, and a driving link wheel is arranged on the output shaft surface on the driven gear side, deep groove ball bearings are rotatably connected to the inside of the housing on both sides of the output shaft surface, and a lubrication structure is arranged on the upper end of the housing inside one side of the deep groove ball bearing;

[0009] A front bearing cap is installed on one side of the housing on the surface of the output shaft, and a rear bearing cap is installed on the other side of the housing on the surface of the output shaft. An intermediate shaft is rotatably connected to one side of the top end of the housing, and an intermediate gear meshing with the driven gear is installed on the surface of the intermediate shaft. A shift fork side cap is installed on one side of one end of the housing close to the rear bearing cap, and a pneumatic mechanism is arranged at the lower end of the shift fork side cap.

[0010] The filtering structure is arranged at the lower end of the shift fork side cover away from the driven gear.

[0011] Preferably, the pneumatic mechanism includes a cylinder, which is installed at the lower end of one side of the inner side cover of the shift fork, and a shift fork sliding shaft is installed at the output end of the cylinder, a spiral compression spring is installed inside the shift fork side cover that moves on one side of the shift fork sliding shaft, and shift fork arms are installed at the upper and lower ends of the other side of the shift fork sliding shaft close to one end of the active link wheel, and a cylindrical pin is provided at the upper end of one end of the shift fork side cover close to the active link wheel.

[0012] Preferably, the lubrication structure includes a lubrication box, an inclined plate, a lever, a blocking ball and a return spring, the lubrication box is installed at the upper end of the shell on one side of the deep groove ball bearing, and a return spring is installed on one side of the top end of the lubrication box, a blocking ball is installed at the bottom end of the return spring, and an inclined plate is installed at the bottom end of the lubrication box on one side of the lubrication box, and levers extending into the lubrication box are installed at one end of both sides of the output shaft surface.

[0013] Preferably, the shape of the inclined plate is triangular, and the inclination angle between the inclined plate surface and the horizontal direction is 25°.

[0014] Preferably, an O-ring is installed at the upper end of one end of the inner part of the shift fork side cover close to the active link wheel, and the inner diameter of the cross section of the O-ring is equal to the outer diameter of the cross section of the cylindrical pin.

[0015] Preferably, the filter structure includes a filter box, a groove, an arc groove, a slide plate, an arc block, a fixed spring, an air inlet, a filter screen, a sealing plate and a C-shaped plate. The filter box is installed at the bottom end of one side of the inner side cover of the fork, and is connected with the cylinder through a conduit at the middle position of the top end of the inner side of the filter box. An air inlet is provided at the middle position of the bottom end of the inner side of the filter box, and C-shaped plates are installed at the upper ends of both sides of the inner side of the filter box. Grooves are provided at equal intervals at the top and bottom ends of the C-shaped plates, and a fixing spring is installed at one end of the groove, and an arc block is installed at one end of the fixing spring. A filter screen is provided at the middle position of the upper end of the inner side of the filter box, and a sealing plate extending to the outside of the filter box is laterally installed at one end of the filter screen. Slide plates matching the filter box are installed on both sides of the filter screen, and arc grooves matching the arc block are provided at equal intervals at the top and bottom ends of the inner side of the slide plate.

[0016] Preferably, the filter screen is in a W-shape, and two sides of the filter screen form a sliding structure through a slide plate and the inside of a C-shaped plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) A shift fork sliding shaft, a shift fork arm and a cylinder are provided. By starting the cylinder, the shift fork sliding shaft slides, and the shift fork arm drives the active link wheel to slide on the surface of the output shaft. At the same time, the active link wheel and the driven gear are tooth-nested and meshed to ensure high-speed meshing stability, thereby driving the movement of the driven gear, automatically shifting the driven gear to the output shaft position and locking it tightly. Then, the rotation of the output shaft drives the rotation of the driven gear. Then, the mutual meshing of the driven gear and the intermediate gear drives the rotation of the intermediate shaft to realize power transmission, avoiding the cumbersomeness of the traditional manual operation of the driving rod, making the whole process simpler and lighter, and facilitating the normal use of the tractor;

[0019] (2) By providing a filtering structure, when it is necessary to control the engagement and separation of the four-wheel drive, the air valve can be opened to inject gas into the filter box, and the W-shaped filter increases the contact area with the gas, reduces the gas flow rate, and thus improves the filtering effect of the gas, preventing impurities from entering the cylinder, affecting its normal use, or even causing damage to it, increasing maintenance costs. At the same time, the sealing plate can be pulled regularly to remove and clean the filter to prevent it from being blocked by impurities. During installation, the elastic force of the fixed spring is used to move the arc block into the arc groove, thereby limiting the position of the slide plate and improving the stability of the sliding installation of the filter.

[0020] (3) By providing a lubrication structure, the rotation of the output shaft will drive the lever to rotate, periodically hitting the blocking ball, causing the blocking ball to move upward and compress the return spring. The lubricating oil inside the return spring then flows down through the gap between the movement of the blocking ball and the lower end of the lubrication box, thereby achieving lubrication between the deep groove ball bearing and the output shaft, reducing friction, and avoiding long-term use, resulting in greater friction between the two, thereby reducing their service life. In addition, the inclined inclined plate is provided to increase the flow rate of the lubricating oil, thereby facilitating the improvement of the lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front cross-sectional structural schematic diagram of the present invention;

[0022] Figure 2 It is a side cross-sectional structural schematic diagram of the present invention;

[0023] Figure 3 It is a schematic diagram of a top cross-sectional structure of the present invention;

[0024] Figure 4 It is an enlarged structural schematic diagram of the lubrication structure of the present invention;

[0025] Figure 5 It is an enlarged structural schematic diagram of the filtering structure of the present invention;

[0026] Figure 6 It is a system block diagram of the present invention.

[0027] In the figure: 1. intermediate gear; 2. intermediate shaft; 3. housing; 4. deep groove ball bearing; 5. front bearing cover; 6. output shaft; 7. transmission shaft bushing; 8. driven gear; 9. active link wheel; 10. rear bearing cover; 11. lubrication structure; 1101. lubrication box; 1102. inclined plate; 1103. shift rod; 1104. blocking ball; 1105. return spring; 12. shift fork sliding shaft; 13. spiral compression spring; 14. shift fork side cover; 15. O-ring; 16. cylindrical pin; 17. shift fork arm; 18. cylinder; 19. filtering structure; 1901. filter box; 1902. groove; 1903. arc groove; 1904. slide plate; 1905. arc block; 1906. fixing spring; 1907. air inlet; 1908. filter screen; 1909. sealing plate; 1910. C-type plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1: Please refer to Figure 1-6 , an electronically controlled mechanical tractor four-wheel drive transfer case, comprising a housing 3 and a fork side cover 14, and also comprising a lubrication structure 11 to avoid excessive friction, a filtering structure 19 to increase the service life of the equipment, and a pneumatic mechanism to avoid cumbersome operation;

[0030] An output shaft 6 extending to the outside of the housing 3 is rotatably connected to the middle position inside the housing 3, and a transmission shaft bushing 7 is installed on one side of the surface of the output shaft 6, a driven gear 8 is provided on the surface of the output shaft 6 on the side of the transmission shaft bushing 7, and a driving link wheel 9 is provided on the surface of the output shaft 6 on the side of the driven gear 8, and deep groove ball bearings 4 are rotatably connected to the inside of the housing 3 on both sides of the surface of the output shaft 6, and a lubrication structure 11 is provided on the upper end of the inside of the housing 3 on one side of the deep groove ball bearing 4;

[0031] A front bearing cover 5 is installed on one side of the housing 3 on the surface of the output shaft 6, and a rear bearing cover 10 is installed on the other side of the housing 3 on the surface of the output shaft 6. An intermediate shaft 2 is rotatably connected to one side of the top of the housing 3, and an intermediate gear 1 meshing with the driven gear 8 is installed on the surface of the intermediate shaft 2. A fork side cover 14 is installed on one side of one end of the housing 3 close to the rear bearing cover 10, and a pneumatic mechanism is arranged at the lower end of the fork side cover 14.

[0032] The filter structure 19 is disposed at the lower end of the fork side cover 14 away from the driven gear 8;

[0033] See also Figure 1-6 A four-wheel drive transfer case for an electrically controlled mechanical tractor further includes a pneumatic mechanism, the pneumatic mechanism including a cylinder 18, the cylinder 18 is mounted at the lower end of one side of the inner side cover 14 of the fork, the input end of the cylinder 18 is electrically connected to the start switch through a wire, the model of the cylinder 18 may be SDA-12x35, and the output end of the cylinder 18 is mounted with a fork sliding shaft 12, the inner side cover 14 of the fork sliding shaft 12 that moves on one side of the fork sliding shaft 12 is mounted with a spiral compression spring 13, and the upper and lower ends of the other side of the fork sliding shaft 12 near one end of the active link wheel 9 are mounted with a fork arm 17, and the upper end of one end of the fork side cover 14 near the active link wheel 9 is provided with a cylindrical pin 16;

[0034] An O-ring 15 is installed at the upper end of one end of the inner side cover 14 of the shift fork, close to the active link wheel 9, and the inner diameter of the cross section of the O-ring 15 is equal to the outer diameter of the cross section of the cylindrical pin 16;

[0035] Specifically, Figure 2 and Figure 3 As shown, by starting the cylinder 18, the shift fork sliding shaft 12 slides, and the shift fork arm 17 drives the active link wheel 9 to slide on the surface of the output shaft 6. At the same time, the active link wheel 9 and the driven gear 8 are tooth-nested and meshed to ensure high-speed meshing stability, thereby driving the movement of the driven gear 8, automatically shifting the driven gear 8 to the position of the output shaft 6 and locking it tightly. Then, the rotation of the output shaft 6 will drive the rotation of the driven gear 8, and then the mutual meshing of the driven gear 8 and the intermediate gear 1 will make the rotation of the intermediate gear 1 drive the rotation of the intermediate shaft 2, thereby realizing the transmission of power and avoiding the cumbersomeness of the traditional manual operation of the drive rod. In addition, the O-ring 15 is provided to improve the sealing between the shift fork side cover 14 and the cylindrical pin 16.

[0036] Embodiment 2: The lubrication structure 11 comprises a lubrication box 1101, an inclined plate 1102, a lever 1103, a blocking ball 1104 and a return spring 1105. The lubrication box 1101 is mounted on the upper end of the housing 3 on one side of the deep groove ball bearing 4, and a return spring 1105 is mounted on one side of the top end of the lubrication box 1101, a blocking ball 1104 is mounted on the bottom end of the return spring 1105, and an inclined plate 1102 is mounted on the bottom end of the lubrication box 1101 on one side of the lubrication box 1101, and a lever 1103 extending to the inside of the lubrication box 1101 is mounted on one end of both sides of the surface of the output shaft 6;

[0037] The inclined plate 1102 is in a triangular shape, and the inclined angle between the surface of the inclined plate 1102 and the horizontal direction is 25°;

[0038] Specifically, Figure 1 , Figure 3 and Figure 4As shown, the rotation of the output shaft 6 will drive the lever 1103 to rotate, periodically hitting the blocking ball 1104, causing the blocking ball 1104 to move upward and compress the return spring 1105, and then the lubricating oil inside the return spring 1105 flows down through the gap generated by the movement of the blocking ball 1104 and the lower end of the lubrication box 1101, thereby realizing the lubrication operation between the deep groove ball bearing 4 and the output shaft 6 and reducing friction. The inclined inclined plate 1102 is provided to increase the flow rate of the lubricating oil, thereby improving the lubrication effect.

[0039] Embodiment 3: The filter structure 19 includes a filter box 1901, a groove 1902, an arc groove 1903, a slide plate 1904, an arc block 1905, a fixing spring 1906, an air inlet 1907, a filter screen 1908, a sealing plate 1909 and a C-type plate 1910. The filter box 1901 is installed at the bottom end of one side of the inner side cover 14 of the fork, and the middle position of the top of the inner side of the filter box 1901 is connected to the cylinder 18 through a conduit. The middle position of the bottom of the inner side of the filter box 1901 is provided with an air inlet 1907, and the upper ends of both sides of the inner side of the filter box 1901 are provided with C-type plates 1910. The C-type plates 1910 are installed at the upper ends of the two sides of the inner side of the filter box 1901. Grooves 1902 are provided at equal intervals at the top and bottom of the interior of 910, and a fixing spring 1906 is installed at one end of the interior of the groove 1902, and an arc block 1905 is installed at one end of the fixing spring 1906, a filter screen 1908 is provided at the middle position of the upper end of the interior of the filter box 1901, and a sealing plate 1909 extending to the outside of the filter box 1901 is transversely installed at one end of the filter screen 1908, and slide plates 1904 matching the filter box 1901 are installed on both sides of the filter screen 1908, and arc grooves 1903 matching the arc block 1905 are provided at equal intervals at the top and bottom of the interior of the slide plate 1904;

[0040] The filter screen 1908 is in a W-shape, and the two sides of the filter screen 1908 form a sliding structure through the slide plate 1904 and the inside of the C-shaped plate 1910;

[0041] Specifically, Figure 3 and Figure 5 As shown, when it is necessary to control the engagement and separation of the four-wheel drive, the air valve can be opened to inject gas into the filter box 1901, and the W-shaped filter 1908 increases the contact area with the gas, reduces the gas flow rate, and thus improves the filtering effect on the gas, preventing impurities from entering the cylinder 18. At the same time, the sealing plate 1909 can be pulled regularly to remove and clean the filter 1908 to prevent it from being blocked by impurities. During installation, the elastic force of the fixed spring 1906 is used to move the arc block 1905 into the arc groove 1903, thereby limiting the position of the slide plate 1904 and improving the stability of the sliding installation of the filter 1908.

[0042] Working principle: When using this device, first install and fix this device, then connect the air inlet 1907 with the output end of the air tank, and connect an external power supply. When it is necessary to control the engagement and separation of the four-wheel drive, the air valve can be opened to inject gas into the filter box 1901, and the W-shaped filter 1908 increases the contact area with the gas, thereby filtering the gas to prevent impurities from entering the cylinder 18 and affecting its normal use. At the same time, the sealing plate 1909 can be pulled regularly to make the slide plate 1904 slide inside the C-shaped plate 1910, so as to facilitate the removal and cleaning of the filter 1908 and prevent it from being blocked by impurities. During installation, the elastic force of the fixed spring 1906 is used to make the arc block 1905 move and snap into the arc groove 1903, thereby limiting the slide plate 1904 and improving the stability of the sliding installation of the filter 1908.

[0043] After that, pure gas enters the cylinder 18, and then the cylinder 18 is started to work, so that the fork sliding shaft 12 slides, and the active link wheel 9 is driven to slide on the surface of the output shaft 6 through the fork arm 17. At the same time, the active link wheel 9 and the driven gear 8 are tooth-nested meshing to ensure high-speed meshing stability, and then drive the movement of the driven gear 8, and automatically shift the driven gear 8 to the position of the output shaft 6 and lock it tightly. Then, the rotation of the output shaft 6 will drive the rotation of the driven gear 8, and then the mutual meshing of the driven gear 8 and the intermediate gear 1 makes the intermediate gear 1 rotate and drive the rotation of the intermediate shaft 2, so as to realize the transmission of power;

[0044] The rotation of the output shaft 6 will drive the lever 1103 to rotate, periodically hitting the blocking ball 1104, so that the blocking ball 1104 moves upward inside the lubrication box 1101 and compresses the return spring 1105. Then, the lubricating oil inside the return spring 1105 flows down through the gap generated by the movement of the blocking ball 1104, realizing the lubrication operation between the deep groove ball bearing 4 and the output shaft 6 and reducing friction. The inclined inclined plate 1102 is set to increase the flow rate of the lubricating oil.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electronically controlled mechanical tractor four-wheel drive transfer case, comprising a housing (3) and a fork side cover (14), characterized in that: It also includes a lubrication structure (11) for avoiding excessive friction, a filtering structure (19) for increasing the service life of the equipment, and a pneumatic mechanism for avoiding cumbersome operation; An output shaft (6) extending to the outside of the housing (3) is rotatably connected to the middle position of the housing (3) in a transverse manner, and a transmission shaft bushing (7) is installed on one side of the surface of the output shaft (6), a driven gear (8) is arranged on the surface of the output shaft (6) on the side of the transmission shaft bushing (7), and a driving link wheel (9) is arranged on the surface of the output shaft (6) on the side of the driven gear (8), deep groove ball bearings (4) are rotatably connected to the inside of the housing (3) on both sides of the surface of the output shaft (6), and a lubrication structure (11) is arranged on the upper end of the inside of the housing (3) on the side of the deep groove ball bearing (4); A front bearing cover (5) is installed on one side of the housing (3) on the surface of the output shaft (6), and a rear bearing cover (10) is installed on the other side of the housing (3) on the surface of the output shaft (6); an intermediate shaft (2) is rotatably connected to one side of the top end of the housing (3), and an intermediate gear (1) meshing with a driven gear (8) is installed on the surface of the intermediate shaft (2); a shift fork side cover (14) is installed on one side of one end of the housing (3) close to the rear bearing cover (10), and a pneumatic mechanism is arranged at the lower end of the shift fork side cover (14); The filtering structure (19) is arranged at the lower end of the shift fork side cover (14) away from the driven gear (8); The pneumatic mechanism comprises a cylinder (18), the cylinder (18) being mounted at the lower end of one side of the inner side of the shift fork side cover (14), and a shift fork sliding shaft (12) being mounted at the output end of the cylinder (18), a helical compression spring (13) being mounted inside the shift fork side cover (14) moving on one side of the shift fork sliding shaft (12), and shift fork arms (17) being mounted at the upper end and the lower end of the other side of the shift fork sliding shaft (12) close to one end of the active link wheel (9), and a cylindrical pin (16) being arranged at the upper end of one end of the shift fork side cover (14) close to one side of the active link wheel (9); The lubrication structure (11) comprises a lubrication box (1101), an inclined plate (1102), a lever (1103), a blocking ball (1104) and a return spring (1105); the lubrication box (1101) is mounted on the upper end of the housing (3) on one side of the deep groove ball bearing (4); a return spring (1105) is mounted on one side of the top end of the lubrication box (1101); a blocking ball (1104) is mounted on the bottom end of the return spring (1105); an inclined plate (1102) is mounted on the bottom end of the lubrication box (1101) on one side of the lubrication box (1101); and a lever (1103) extending into the lubrication box (1101) is mounted on one end of both sides of the surface of the output shaft (6); The filtering structure (19) comprises a filtering box (1901), a groove (1902), an arc groove (1903), a slide plate (1904), an arc block (1905), a fixing spring (1906), an air inlet (1907), a filter screen (1908), a sealing plate (1909) and a C-shaped plate (1910). The filtering box (1901) is installed at the bottom end of one side of the inner side cover (14) of the shift fork, and the middle position of the top end of the inner side of the filtering box (1901) is connected to the cylinder (18) through a conduit. The middle position of the bottom end of the inner side of the filtering box (1901) is provided with an air inlet (1907), and the upper ends of both sides of the inner side of the filtering box (1901) are provided with C-shaped plates (1910). The top and bottom ends of the filter box (1910) are provided with grooves (1902) at equal intervals, and a fixing spring (1906) is installed at one end of the groove (1902), and an arc block (1905) is installed at one end of the fixing spring (1906). A filter screen (1908) is provided at the middle position of the upper end of the filter box (1901), and a sealing plate (1909) extending to the outside of the filter box (1901) is installed transversely at one end of the filter screen (1908). Slide plates (1904) matching the filter box (1901) are installed on both sides of the filter screen (1908), and arc grooves (1903) matching the arc block (1905) are provided at equal intervals at the top and bottom ends of the slide plate (1904).

2. The four-wheel drive transfer case for an electronically controlled mechanical tractor according to claim 1, characterized in that: The shape of the inclined plate (1102) is triangular, and the inclination angle between the surface of the inclined plate (1102) and the horizontal direction is 25°.

3. The four-wheel drive transfer case for an electronically controlled mechanical tractor according to claim 1, characterized in that: An O-ring (15) is installed at the upper end of one end of the inner part of the shift fork side cover (14) close to the active link wheel (9), and the inner diameter of the cross section of the O-ring (15) is equal to the outer diameter of the cross section of the cylindrical pin (16).

4. The four-wheel drive transfer case for an electronically controlled mechanical tractor according to claim 1, characterized in that: The filter screen (1908) is in a W-shape, and two sides of the filter screen (1908) form a sliding structure through the slide plate (1904) and the inside of the C-shaped plate (1910).

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